- Joined
- Dec 29, 2016
- Messages
- 95
- Reaction score
- 38
Ok so I recently got back in hobby again after like 6y break . Started small 20G tank so i did like 20% water change yesterday tested alk today and its around 11.2 . so mixed small cup with fresh salt mix ( 6y old aquaforest reef salt what i had lying around the same salt was used to start the tank . ) and the reading on new mix was 2.0 alk did the test 2 times on the tank and on the mix and the readings was the same . Does that even make sense? What would rise the alk so high in tank and why fresh mix alk is so low ?!

